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Message, Text Encryption iPhone iOS

Other Topics

Quick Start

Encryption
Decryption

Steganography


Session Password

Settings

Forgotten Password

System Clipboard

A - Unencrypted Text Area

B - Encrypted Text Area

C - Set Password Button

D - Encrypt/Decrypt Buttons

E - Import/Export Unencrypted Text

F - Erase Text Areas

G - Maximize/Minimize

H - Import/Export Encrypted Text

I - More Options Button

Frequently Asked Questions

Issue: The text is decrypted even when I change the algorithm in the application settings. How is that possible?

Answer: You can set an ENCRYPTION algorithm (the decryption algorithm is detected automatically - information about the used algorithm is part of the application data format).



Issue: The application produces a completely different output (using the same input) whenever I tap the encrypt button. How is that possible?

Answer: Two words for DuckDuckGo, Google (or some other search engine): cryptographic salt.



Issue: I forgot my password. Can you help me?

Answer: No, there is no backdoor. It's the purpose of the application. All data are encrypted (mathematically altered) using the password. Without the password you can't reverse the process and "reconstruct" original data. We can't help you. Nobody can. The correct password is the only way.



Issue: Why can't I use other application(s) that work with the same ciphers? For example AES to decrypt texts?

Answer: It isn't only about an encryption algorithm, there are many other pieces: encryption mode (CBC, CFB, PCBC, OFB, CRT, CWC, EAX, ...), password processing (KDF - Key Derivation Function), compression etc... Detailed format specifications can be found here.



Issue: Why doesn't the application use fingerprints to access encrypted files?

Answer: All data is fully encrypted (mathematically altered), and exact encryption key matching is required to perform decryption. Without a 100% correct key, the process can't be reversed to "reconstruct" the original data. Fingerprints are typically used for authentication - the originals are stored and compared during the authentication process, but the data is only hidden, not encrypted. Reliable encryption using fingerprints, including generating a secure encryption key from them, has not been accomplished to date - there have been only a few unreliable experiments. Importantly, fingerprints are not secret and cannot be changed. If someone obtains a copy of your fingerprints (which is quite easy to do, as you leave your 'password' on everything you touch), all of your data, past and present, would be accessible to them. P.F.E. will NEVER use biometric data, either directly or indirectly, for ENCRYPTION purposes.

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